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-space at an obama. he's speaking live right now in washington dc. >> well, here's a strange twist to the tech talk all pairs also something new can include something old like guns, homemade guns. guns that metal detectors can't detect. it's all perfectly legal and it's unrelated. cbs five alan martin shows us how 3-d printers are being used to make plastic guns that will fire real, deadly bullets. >> reporter: they come in all shapes and sizes. now there is a whole new way that a piece can be produced. the brainchild of the university of texas law student has become a reality, thanks to something called a 3-d printer. the machine actually looks like a photocopier, it usually generates models like these. >> but the group defends the stripping looking to make a real gun. here's how it works. the design of the gun is programmed into a 3-d printer. printer then shapes a piece of hard plastic into a firewall -- into a fireable weapon. the final schematics will be distributed online, then anyone with a 3-d printer on a computer will be able to print a gun at home. >> we will have the reality of a weapon
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